A 3.5-g sample of colorado oil shale is burned in a bomb calorimeter, which causes the temperature of the calorimeter to increase by 5.0°c. the calorimeter contains 1.00 kg of water (heat capacity of h2o = 4.184 j/g°c) and the heat capacity of the empty calorimeter is 0.10 kj/°c. how much heat is released per gram of oil shale when it is burned?

Question

Audrey Buck

Chemistry

15 June, 19:11

A 3.5-g sample of colorado oil shale is burned in a bomb calorimeter, which causes the temperature of the calorimeter to increase by 5.0°c. the calorimeter contains 1.00 kg of water (heat capacity of h2o = 4.184 j/g°c) and the heat capacity of the empty calorimeter is 0.10 kj/°c. how much heat is released per gram of oil shale when it is burned?

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Abby Stephenson · Answer 1

q (rxn) = - [q (water) + q (bomb) ] q (rxn) = - {[ (1000g) (4.184) (5.0) ] + [ (5.0) (0.10) ]} q (rxn) = - (20920 + 0.5) Now we divide 3.5g q (rxn) = - (20920) / (3.5g) q (rxn) = 5977.14 And final answer, change is to Kilo joule unit - q (rxn) = 5.23 KJ/unit